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Mike from Thomaston, Ga writes

Will Cornerstone Plus Herbicide stuff damage catalpa trees?

I used this stuff for the first time as spring weeds were popping up around my catalpa tree, and for the first time in 25 years it did not have any catalpa worms. Does it damage or leave residue that effects the moths decision to lay eggs on that particular tree?

Answer:

Cornerstone Plus Herbicide only contains glyphosate, which would kill sprayed weeds/plants/trees.  It would have no effect on insects.  You should avoid spraying inside the dripline of desirable trees to avoid any contact with roots as they could be injured if they absorb the product.

Answer last updated on: 08/26/2019

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